Question

scientists have identified one part of the brain that can change after an amputation. this part of the brain is called the somatosensory (suh-mat-uh-uh-sen-suh-ree) cortex. it receives signals about physical sensations from limbs and other body parts.
somatosensory
cortex
when a body part is amputated, it stops
sending signals to the somatosensory
cortex. when this happens, the
somatosensory cortex itself can change.
some scientists think that these changes in
the somatosensory cortex create new types
of signals in the brain. the scientists
hypothesize that the brain interprets these
signals as phantom pain in the body part
that has been amputated.
the brain
what might happen to the somatosensory cortex of a person who has a foot amputated?
click the blue words to correct the following statements.
before the persons foot is amputated, it sends signals to the somatosensory
cortex. but after the foot is amputated, the somatosensory cortex receives signals
from the foot. when this happens, the somatosensory cortex can change in a way
that may cause phantom pain.

Explanation:

The text states that amputated body parts stop sending signals to the somatosensory cortex, so the cortex no longer receives signals from the amputated foot. The changes in the cortex are hypothesized to create signals interpreted as phantom pain.

Answer:

Before the person's foot is amputated, it sends signals to the somatosensory cortex. But after the foot is amputated, the somatosensory cortex stops receiving signals from the foot. When this happens, the somatosensory cortex can change in a way that may cause phantom pain.